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IDProjectCategoryView StatusDate SubmittedLast Update
0007486ardourbugspublic2017-10-07 12:022017-10-11 06:46
Assigned To 
PlatformIntel 64bitOSUbuntu StudioOS Version14.04
Product Version5.12 
Target VersionFixed in Version 
Summary0007486: Assertins when cuting regions
DescriptionSometimes Ardour crashes when cutting reagions with the cut tool. When using the split feature, no crashes occur.


ardour-5.12.0: ../gtk2_ardour/ virtual void RegionMotionDrag::motion(GdkEvent*, bool): Assertion `!_views.empty ()' failed.

See attached backtrace for more information
Steps To ReproduceNot always reproducible. Trying to cut a region via click-drag to the exact point and then letting go of the mouse button. On my machine, aber about 5-10 cuts it crashes.
Additional InformationBacktrace of the assertion is attached. Ardour was compiled with optimization.
TagsNo tags attached.
Attached Filestxt file icon Ardour_backtrace.txt [^] (6,412 bytes) 2017-10-07 12:02 [Show Content]

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-  Notes
timbyr (developer)
2017-10-10 17:38

I cannot reproduce this issue with 5.12 using the cut tool/mode and splitting regions several hundred times in as many different ways as I can.

Is there any other information or steps that might be relevant in order to reproduce this?

The backtrace you have attached indicates that a region move is occurring at the time of the crash but AFAICT you cannot move a region in cut mode?
oswaldm (reporter)
2017-10-11 06:46

Ok, what might be relevant is that the region to be cut is in a track which is part of a group (think a guitar track and a guitar DI track which should be edited simultanously). The group was sometimes enabled, sometimes disabled when cutting, crashes occured on both occasions (with group enabled/disabled).

The split region function never showed the crash, only the cutting tool, so this was the workaround.

Also it crashed most often with the click-drag-release for finding the right place to cut (which I could imagine could be the source of the region move?)

I also observed this from Ardour 5.8 onwards as I do more often editing of the audio.

- Issue History
Date Modified Username Field Change
2017-10-07 12:02 oswaldm New Issue
2017-10-07 12:02 oswaldm File Added: Ardour_backtrace.txt
2017-10-10 17:38 timbyr Note Added: 0020049
2017-10-10 17:38 timbyr Status new => feedback
2017-10-11 06:46 oswaldm Note Added: 0020053
2017-10-11 06:46 oswaldm Status feedback => new

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